Subnautica is an underwater adventure game set on an alien ocean planet. A massive, open world full of wonder and peril awaits players as they dive into the depths to explore coral reefs, volcanic caves, and twisting underwater rivers. With its survival and crafting elements, players must manage their oxygen supply, craft equipment, and build underwater habitats to survive. Developed by Unknown Worlds Entertainment, Subnautica was released for the PlayStation 4 in December 2018. The game is praised for its immersive environment, exploration, and unique narrative.